title: Concentration-dependent energy transfer studies in ternary dye mixture of Stilbene-420, Coumarin-540 and Nile Blue.
abstract: The energy transfer studies in the case of ternary dye mixture [Stilbene-420 (donor)+Coumarin-540 (intermediator)+Nile Blue (acceptor)] have been done and discussed through optical gain characteristics at various acceptor concentrations under nitrogen laser excitation. The concentration of the other two dyes were kept constant. It is observed that the concentration of the acceptor dye plays a very critical role in energy transfer dye laser (ETDL) as small change in its concentration varies the intensity of the laser output in the red region by large amount. Also, the highest laser output in the red region is obtained when the concentration of the acceptor dye is slightly higher than that of the intermediator dye. The present studies are helpful in deciding the optimum concentration of the acceptor dye to be used in ternary dye mixture for maximum gain and tuning range. The ternary dye mixture under study provides an ETDL tuning range up to 700 nm.
authors.affiliation: Department of Physics, MD University, Rohtak 124001, India. harimoudgil1@rediffmal.com
authors.forename: A K
authors.initials: AK
authors.lastname: Sharma
authors.forename: D S
authors.initials: DS
authors.lastname: Ahlawat
authors.forename: D
authors.initials: D
authors.lastname: Mohan
authors.forename: R D
authors.initials: RD
authors.lastname: Singh
mesh_terms: D015502:Absorptiometry, Photon / Q000295:instrumentation; D003374:Coumarins / Q000737:chemistry / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D004338:Drug Combinations; D004735:Energy Transfer / Q000187:drug effects*; D005456:Fluorescent Dyes / Q000737:chemistry / Q000494:pharmacology; D054020:Lasers, Gas; D008954:Models, Biological; D009994:Osmolar Concentration; D010078:Oxazines / Q000737:chemistry / Q000494:pharmacology*; D013267:Stilbenes / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D003374:Coumarins; D004338:Drug Combinations; D005456:Fluorescent Dyes; D010078:Oxazines; D013267:Stilbenes; C008619:Nile Blue; C030123:coumarin